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How to check if command line tools is installed

...as it appears in the Applications directory. There are also the xcodebuild and xcode-select files in /usr/bin I need to know if the command line tools is installed. Is there a command for it? What can I do to see if XCode CLT is installed and if yes to find the version installed? ...
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Start may not be called on a promise-style task. exception is coming

I am creating a simple wpf desktop application. UI have just a button and code in .cs file like. 3 Answers ...
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Time complexity of Euclid's Algorithm

...ow what happens over two iterations: a', b' := a % b, b % (a % b) Now a and b will both decrease, instead of only one, which makes the analysis easier. You can divide it into cases: Tiny A: 2a <= b Tiny B: 2b <= a Small A: 2a > b but a < b Small B: 2b > a but b < a Equal: a ==...
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How can foreign key constraints be temporarily disabled using T-SQL?

Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints? ...
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Spring classpath prefix difference

...es under conf folders in all your jars on the classpath will be picked up and joined into one big application context. In contrast, classpath:conf/appContext.xml will load only one such file... the first one found on your classpath. ...
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MVC3 DropDownListFor - a simple example?

...In order to get this to work I had to create an inner class that had an ID and a value property, then I had to use an IEnumerable<Contrib> to satisfy the DropDownListFor parameter requirements. Now, however, how is MVC FW supposed to map the value that is selected on this drop-down back ...
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How is pattern matching in Scala implemented at the bytecode level?

... case Sum(l,r) // instance of check followed by fetching the two arguments and assigning to two variables l and r but see below about custom extractors case "hello" // equality check case _ : Foo // instance of check case x => // assignment to a fresh variable case _ => // do nothing, this is...
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Pandas get topmost n records within each group

Suppose I have pandas DataFrame like this: 3 Answers 3 ...
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整合phpcms v9和discuz X3.2实现同步登陆、退出免激活 - 更多技术 - 清泛网...

...FORBIDDEN; } header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"'); $cookietime = 31536000; $uid = intval($get['uid']); $query = DB::query("SELECT uid, username, password FROM ".DB::table('common_member')." WHERE uid='$uid'"); if ($member = ...
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C++ : why bool is 8 bits long?

... Yes, it's a hardware choice, and if the hardware allows for it, the size of a bool could change. But the OP asked why a bool is 8 bits wide, and on systems where that is the case, it is generally because the CPU is only able to address 8-bit bytes. ...